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I reflashed my 4.3 V6 from 12208322 to 12212156 and now the motor won't start. I read the PCM first then reflashed the new OS. All seemed fine but won't start. I have seen this before but can't put my finger on it. Any help greatly appreciated.
Good times!
Bruce
Did you do a full flash?
See this:
Quote:
Originally Posted by joecar
Quote:
Originally Posted by joecar
I think so, I reread the tune and it seems to have taken it, the new OS with my old vin is there and no differences when I compare the two tunes. The reflash was framed in red warning of the reflash which I had never seen before, but never have changed OS before either. I'm charging the battery now as I just got back to the states and it was dead but I charged it over night when I got in and it seemed strong but it pulled down fast when cranking and always starts up almost instantly after reflashing with the old OS. I'll try a re-reflash after it is re-recharged!
That is great information! The reason I'm changing the OS to 12212156 is for the COS5 eventual app. But first I need to get the new OS working. I'll keep reading!
Good times!
Bruce
I found one thing....Low Resolution Crank is "Yes" on the Vehicle Platforms Options of my old OS so I'll switch that to YES on the '02 12212156 OS and reflash to see if that makes things work.
Good times!
Is the 12212156 OS tune you are trying to flash from a 4.3 L V6 ?
All 4.3 L V6 (and 5.0 L & 5.7 L Vortec) feature low resolution CKP sensors - 3x on the V6, and 4x on the V8. Gen III V8 OS use a non-low resolution CKP (24x).
Regards,
Taz
Ok...The Low Resolution Crank change didn't do it. I re-reflashed the new OS with the Low Res change in it, and still no joy on the starting...fuel pressure powers up and is ok, just won't start. Do I need to do a crank re-learn? There is the message that CKP learn can be done with Scan tool. Do I need to do this? Thanks!
Yes from a 4.3....and it didn't have the low res set in the parameters so I changed to "yes" on the 12212156 tune I found on Holden's repository and shows for the S-10 in the vin/model section. Do I need to do a re-learn?
Quote:
Originally Posted by Taz
When you select Full Flash (Cal & OS) - and the "Red" screen appears - the 3rd tab is "CASE" - if the engine and PCM were originally from the same vehicle (like yours) - then you can select the "Preserve CASE data - No CASE relearn required" option. In other words, if you are simply Full Flashing an existing engine / PCM combination - the existing CASE data is accurate.
If you failed to select this option, then a CASE learn is required. The engine needs to be running (and at normal operating temperature) to initiate the CASE learn function.
The engine should still start and run prior to the CASE learn.
What year / make / model / trans are you working with ?
Regards,
Taz
The vehicle is a '91 S-10 Blazer 4x4. Engine is a '96 4.3 Black Box PCM that I converted to '0411 that was out of a 2001 S-10. The trans is a 700r4! The former OS has been operating fine but I'm edging up to COS5 via the 12212156 OS for forced induction using a Procharger with all fueling issues already addressed-(marine manifold, injectors, pumps).
I didn't see the "Preserve CASE data'" items...would that cause the vehicle not to start? I will next reflash my original back in to start over next...reluctantly!
Good times!
Bruce
Wow ... that's a custom vehicle. I'm concerned that the 12212156 OS was somehow corrupted ... should have been "Low Res" is the vehicle platform options. The 2001 tune you had been running ... was it a manual trans tune (given the 700R4) ?
Asking these questions to see if I have anything squirreled away in my little database that may help out.
No matter whether you did / did not preserve the CASE data - the engine should still start and run - it will just set a DTC.
Regards,
Taz
Right! The engine should start! The vehicle has been running with the OS for the electronic automatic and I had "tuned" the new 12212156 tune with manual settings from a 2002 manual camaro with a 12212156. I haven't been able to find a manual tune with the old OS 12208322 so that has held me back until now. Still hung up so far though. Corrupt file might be though...
Good times!
Bruce
Try this tune ... set the speedometer gear to 40 teeth (assuming that's what your 700R4 is using).
Regards,
Taz
I'll try it!! Thanks a million and I will let you know tomorrow! Thanks Taz!!
Good times!
Bruce
Hey Taz, your OS12212156 tune worked!! Started right up! Of course it died right away because of my modifications but I know this is sound for a foundation....it started!! Thanks sooo much!
Good times!
Bruce
Well not so fast, I entered my injector flow rates thinking that would work but still have the start up then die issue. Time to start searching the forum!
Good times!
Did you change the vats?
Try setting it to none
Right, forgot about that! Changed to 'none' on the VATS and will try again! Thanks!!
Good times!
That worked!!! It's running again! Looks like I have a few DTC codes to track down now...after lunch! Thanks for your help!
Good times!
Bruce
Good deal.
Nice to hear you got it running - nothing worse than a "no start" event. You will need to confirm the knock sensor(s) you are using - tune is currently configured for Flat Response (LS2 style) knock sensors - found in B1402. I believe the type of knock sensor changed at some point on the 4.3 L V6 - not sure when - you may have the Resonant (LS1 style) knock sensor.
Regards,
Taz
I had to change knock sensors to the flat response type when I installed the '0411 a few years back. If I have a problem with weeding out the DTC's I'll be back!
Thanks again!
Good times!
Bruce
Just to update this thread and confirm that the tune file in post 14 is not a true stock manual trans file. Some of the airflow tables and quite a few others are not close to being consitant with an original factory man tune for a S10. Enough differences to cause driveability issues. Although it can be made to work with the correct changes just not 100% correct.
Also forgot to say I will post up the 2002 s10 man. tune as soon as I confirm the ecm has never been flashed by this trucks owner.As I have already read it. But 100% sure it is a man tun as I am looking at the truck. These 4.3 s10's are hard to come by in a stick.
Thanks "slows10"! I look forward to compareing your "stock" tune with mine to see if I missed anything. I do have some issues that I need to iron out the next time I'm back in the states. I have the blower on and managed 21mpg on a 500 mile trip, also making 4#'s of boost with the current pulley which I have a 3.75" replacement pulley to replace the 4.1". Removed and cleaned the injectors which helped but still need a 2 bar map to make things work w/cos5. Things pulled pretty good for 4#'s but I really didn't take time to do much tuning-other family priorities ya know.
Good times!
Bruce
I uploaded one for a 2002 blazer to holdencrazy. The transmission segment is probably different and things like gearing and fuel tank, but you should be able to look at the airflow tables from that. Otherwise, I think there was a Sonoma or S10 tune up that should work.
Correct. Since the op has a auto trans he should be able to use the airflow tables. But for someone running a manual trans, this tune is not correct. Thats what I was pointing out. It shouldnt really be labeled a manual trans tune when its not. Just tryin to help others in the future who may need this tune. The airflow tables and others are alot different between a man and automatic.Quote:
Originally Posted by nevinsb
Aah, I thought he wanted to use a manual tune for the 700R4 and copy the airflow tables over from an automatic tune.